/*
 * Copyright (C) 2011 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.ros.internal.node.service;

import org.ros.MessageDeserializer;
import org.ros.MessageSerializer;

import java.nio.ByteBuffer;

/**
 * @author damonkohler@google.com (Damon Kohler)
 */
public abstract class ServiceResponseBuilder<RequestType, ResponseType> {

  private final MessageSerializer<ResponseType> serializer;
  private final MessageDeserializer<RequestType> deserializer;

  ServiceResponseBuilder(MessageSerializer<ResponseType> serializer,
      MessageDeserializer<RequestType> deserializer) {
    this.serializer = serializer;
    this.deserializer = deserializer;
  }

  ByteBuffer handleRequest(ByteBuffer buffer) throws ServiceException {
    RequestType request = deserializer.<RequestType>deserialize(buffer);
    ResponseType response;
    response = build(request);
    return serializer.serialize(response);
  }

  abstract ResponseType build(RequestType requestMessage) throws ServiceException;

}
